Audaciously cantilevered out over a new stretch of Riverwalk, 150 North Riverside commands attention as few recent buildings have. The glassy office tower’s 54 floors, carefully engineered to stand tall above busy rail lines, look down all three branches of the Chicago River. The soaring lobby, whose enormous glass wall transparently connects indoors and out, is defined by _150 Media Stream_, a one-of-a-kind expression of art, architecture and technology. The piece’s 89 LED blades, stretching 150 feet long and rising 22 feet high, display ever-changing collaborative artworks developed by local and international established and emerging artists, arts educators and students.